Shop OBEX P1 Docs P2 Docs Learn Events
loopback problem — Parallax Forums

loopback problem

joreyajoreya Posts: 4
edited 2008-12-03 00:46 in BASIC Stamp
Hi,

I am trying to programme robotics with the boe-bot
when I choose run then identify. under the loopback it said no.
did anyone know what is the problem ?

Thanks,
·

Comments

  • Mike GreenMike Green Posts: 23,101
    edited 2008-11-29 20:53
    There is usually a problem with the serial connection. If it's a direct connection, the cable may be faulty. If there's a USB to serial adapter, there may be a problem with the USB driver. Normally, the Stamp Editor looks for a connection between DSR and RTS (see page 28 of the Basic Stamp Manual). The Board of Education (Boe) on the BoeBot provides this.
  • joreyajoreya Posts: 4
    edited 2008-11-29 22:18
    I am not using direct connection. I am using USB to serial adapter. The USB is fine, but I don't know what's the matter. Could you tell me how can I fix it ?
  • Mike GreenMike Green Posts: 23,101
    edited 2008-11-29 22:24
    What kind of USB to serial adapter is it? Some of them do not implement the DSR and RTS lines properly and won't work for programming a Stamp. Also, what I/O driver are you using? If it's the default Windows driver, that probably won't work. You'll have to deactivate it and install the manufacturer's driver.

    There's a discussion of this via a link on the main Parallax webpage (www.parallax.com/Portals/0/Downloads/docs/prod/ftdi/USBDriverTroubleshooting-V1.0.pdf).
  • MSDTechMSDTech Posts: 342
    edited 2008-11-30 04:55
    Also, one problem I constatly run into is I forget to make sure the boe-bot is turned on and that the batteries are good. If I can only remember to turn on the board before trying to communicate.
  • Phil Pilgrim (PhiPi)Phil Pilgrim (PhiPi) Posts: 23,514
    edited 2008-11-30 08:33
    I don't think the lack of a loopback is, in and of itself, a fatal error. IIRC, it's reported, but not required. (The fact that the Stamp Editor resets any Propeller chips that are connected is further evidence of this.) An improperly implemented DTR line, however, would be a problem. Also, just out of curiosity, does the Identify operation report an echo?

    -Phil
  • Chris SavageChris Savage Parallax Engineering Posts: 14,406
    edited 2008-12-02 19:13
    Phil is correct…loopback is not required. It’s there more as a check then anything else. I guess I am not clear though on whether you’re able to identify or program your BASIC Stamp.

    ▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔▔
    Chris Savage
    Parallax Engineering
  • joreyajoreya Posts: 4
    edited 2008-12-03 00:46
    Thank you all. I fixed the problem. There was a problem with the USB.

    Thanks
Sign In or Register to comment.